如何檢查設備是否具有用於生物識別身份驗證的傳感器？ (react-native-fingerprint-scanner)

Question

我正在使用這個庫對生物識別傳感器（例如面部 ID 或指紋掃描儀）進行身份驗證，但我想知道如何檢測設備是否有傳感器： react-native-fingerprint-scanner

根據它的文檔，有一個名為.isSensorAvailable()的 API 但我不明白如果設備中沒有任何可用的傳感器，它會返回什么。

Answer 1

您可以像下面的示例一樣使用.isSensorAvailable() API。

import FingerprintScanner from 'react-native-fingerprint-scanner'

    FingerprintScanner
                .isSensorAvailable()
                .then(() => {
                // Call the Fingerprint Scanner Method
                    FingerprintScanner
                        .authenticate({ description: 'Authenticate to access this' })
                        .then(() => {
                            // Method for Authentication
                            onAuthenticate()
                        })
                        // Call error method
                        .catch(error => onAuthenticationFailure(error))

                })
                 //Call the error method
                .catch(error => onAuthenticationFailure(error))

Answer 2

從“react-native-biometrics”導入 ReactNativeBiometrics；

ReactNativeBiometrics.isSensorAvailable().then(resultObject => {
  const {available, biometryType} = resultObject;

  if (available && biometryType === ReactNativeBiometrics.TouchID) {
    console.log('TouchID is supported');

  } else if (available && biometryType === ReactNativeBiometrics.FaceID) {
    console.log('FaceID is supported');

  } else if (
    available &&
    biometryType === ReactNativeBiometrics.Biometrics
  ) {
    console.log('Biometrics is supported');
    try{
ReactNativeBiometrics.simplePrompt({
  promptMessage: 'Confirm fingerprint',
})
  .then(resultObject => {
    const {success} = resultObject;

    if (success) {
      console.log('successful biometrics provided');

    } else {
      console.log('user cancelled biometric prompt');
    }
  })
  .catch(() => {
    console.log('biometrics failed');
  });
}
catch(e){
  console.log("Device not Support Fingerprint")
}
  } else {
    console.log('Biometrics not supported');
  }
});